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North america

Back to America: 8000 to 5000 B.C.

1. far north and canada

In the far north there was a micro-blade tradition called "Little Arm" with evidence of caribou and elk hunting dated from 5,500 to 4,000 B.C. In Canada by 4,000 B.C. the Maritime Provinces were settled by hunters, fishers, and gatherers. The Columbia plateau folks, previously mentioned, were hunting elk and deer in the forests of Douglas fir and western yellow pine, and fishing for salmon in the Columbia by 9,000 B.C. (Ref. 209 , 45 )

2. the united states

Between 5,000 and 3,800 B.C. the temperature lowered again and precipitation increased so that some game returned as the climate approached what it is today. Even so the hunting cultures gradually gave way to a type in which the people were not specialized in a single skill but were versatile enough to attempt other things.

In the Eastern Woodlands there was now a "Middle Period" with great variation from area to area. Some used antlers and bones for fish-hooks, spears and harpoons, some learned to use copper for tools and ornaments. In the latter respect, a distinctive culture of the Great Lakes and upper Mississippi Valley, beginning about 4,500 B.C., was the "Old Copper Culture" in which the metal was worked either in the cold or hot state, but it was never melted or cast. Knives, barbed harpoon points and atlatl weights (throwing sticks) were made in this way. There was no big game present and most of the inhabitants of the eastern societies used steatite vessels. The earliest of the Archaic Cultures is sometimes called the southern "Indian Knoll Society", with a later northern Lauretain Culture about the Great Lakes and on eastward where along the Labrador coast it eventually came face to face with Eskimos. (Ref. 64 , 45 , 209 )

The western Desert Culture was oriented toward plants, collecting of small seeds and roots for food. Plant fibers were used for baskets, footwear and nets for snares.

In the southwest, the Chircahua Phase of the Cochise Culture made its appearance about 5,000 B.C. and was to last about 3,000 years. It was there that maize first appeared in the United States, sometime between 3,000 and 2,000 B.C., apparently brought up from Mexico where it had been cultivated long before. The Cochise could grow the corn because they had the soil, the right growing season and the necessary skills and tools. They could already weave baskets in which to store it and had long used grinding tools to pulverize seeds and nuts. This early desert society later gave way to the Pueblo and Mexican empires. In California the San Diego County Archeological Society recently brought suit against a land development firm, alleging that it intentionally marred a site thought to have been occupied by La Jolla Indians 3,000 to 7,000 years ago

Complaints have been made that other construction projects have destroyed hundreds of prehistoric Indian sites in California. Estimates give more than 600 Yokuts villages, campsites and burial grounds in Merced and Stanislaus counties. Logging operations in the Sierra Nevada range have churned up innumerable similar sites. Along the south coast there were Chumash, Gabrielinos, Fernandenos and some others, depending upon a fishing and food gathering existence. These people were apparently free of intertribal wars and did not have the cyclical famines suffered by groups dependent upon farm crops. They lived in large villages, used plank canoes and traded with villages on the Channel Islands, often bartering the coastal basketry for effigies carved from the steatite rock of Catalina (Ref. 106 ).
. Excavations on Catalina Island just off the California coast, show that man gorged himself on abalone in the 4th millennium B.C., almost wiping out the colonies (Ref. 106 , 211 , 45 , 210 )

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studies of microbes
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they make spores
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Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
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This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
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Examples of thermophilic organisms
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Give Examples of thermophilic organisms
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Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
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They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
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cell is the smallest unit of life
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cell is the structural and functional unit of life
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is the fundamental units of Life
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Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
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part of a tissue or an organ being wounded or bruised.
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Binomial nomenclature
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Source:  OpenStax, A comprehensive outline of world history (organized by region). OpenStax CNX. Nov 23, 2009 Download for free at http://cnx.org/content/col10597/1.2
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